Games like 雪晴日 (Waiting for sunshine)
Games like 雪晴日 (Waiting for sunshine) include Undertale, Mirror 2: Project X, Volcano Princess, Milk outside a bag of milk outside a bag of milk, and Tales of the Black Forest. We matched them by the tags players give 雪晴日 (Waiting for sunshine) on Steam (RPG, 2D Platformer, Visual Novel, Female Protagonist, and 2D): closest matches first, and among equally close ones the better-known games.

Undertale
Shared: Story Rich · RPG · Multiple Endings

Mirror 2: Project X
Shared: Female Protagonist · Visual Novel · RPG

Volcano Princess
Shared: RPG · Female Protagonist · Multiple Endings

Milk outside a bag of milk outside a bag of milk
Shared: Visual Novel · Story Rich · Multiple Endings

Tales of the Black Forest
Shared: RPG · Female Protagonist · Story Rich

Road to Empress I
Shared: RPG · Female Protagonist · Visual Novel

Aliya: Timelink
Shared: RPG · Visual Novel · Multiple Endings

Far Away
Shared: Visual Novel · Female Protagonist · Story Rich

Celeste
Shared: 2D Platformer · Female Protagonist · Indie

Ignited in Cavern
Shared: RPG · Visual Novel · Female Protagonist

月华辉映之刻
Shared: Female Protagonist · RPG · Visual Novel

Suzerain
Shared: Visual Novel · RPG · Story Rich

OMORI
Shared: RPG · Story Rich · Indie

The Coffin of Andy and Leyley
Shared: Visual Novel · Story Rich · Multiple Endings

OPUS: Echo of Starsong - Full Bloom Edition
Shared: Visual Novel · Female Protagonist · Story Rich

灾厄黑龙与谎言公主
Shared: RPG · Visual Novel · Female Protagonist

The Life and Suffering of Sir Brante
Shared: RPG · Story Rich · Visual Novel

DELTARUNE
Shared: RPG · Story Rich · 2D

Love Curse: Find Your Soulmate
Shared: Visual Novel · Female Protagonist · RPG

Sweet Home
Shared: RPG · Visual Novel · Female Protagonist

Ten Trials of Babel: The Doppelganger Maze
Shared: Female Protagonist · RPG · Story Rich

CrossCode
Shared: RPG · Female Protagonist · 2D

Gestalt: Steam & Cinder
Shared: RPG · Female Protagonist · 2D Platformer

My Vow to My Liege
Shared: Female Protagonist · RPG · Visual Novel